TM-9-2320-280-34

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

JANUARY 1996
TM-9-2320-280-34

  TM-9-2320-280-34 - Page 880 of 1258

TM 9-2320-280-34
1 7 - 9 6
Change 1
1 7 - 2 1 . DIRECT CLUTCH ASSEMBLY REPAIR (4L80-E)
Materials/Parts
Inner seal (Appendix E, Item 155)
Center seal (Appendix E, Item 154)
Outer seal (Appendix E, Item 156)
Transmission fluid (Appendix B, Item 24)
Equipment Condition
Transmission disassembled into subassemblies
(para. 17-14).
General Safety Instructions
Air pressure must not exceed 80 psi (552 kPa)
when air checking clutch piston.
Maintenance Level
General support
This task covers:
a.
Disassembly
d.
Assembly
b.
Cleaning
e.
Direct Clutch Piston Movement Measurement
c.
Inspection
NOTE
Work area should be well-ventilated, clean, and free from blowing
dirt and dust.
1.
Remove snapring (1), clutch retainer (2), and outer race (3) from direct clutch housing (5).
2.
Remove sprag assembly (4) from direct clutch housing (5).
3.
Remove snapring (6), backing plate (7), five clutch plate assemblies (8), clutch plates (10), and
dished plate (9) (1995-1996 transmission only) from direct clutch housing (5).
NOTE
Piston removed in step 4 is for 1995-1996 transmissions only.
4.
Using spring compressor, adapter, and clutch spring adapter, remove snapring (11), spring and
retainer assembly (12), and piston (13) from clutch housing (5).
NOTE
Perform step 5 for 1995-1996 transmissions only.
5.
Remove inner (14), outer (15), and center seals (16) from clutch housing (5). Discard seals (14), (15),
and (16).
Clean all direct clutch components in accordance with para. 2-13.
NOTE
For general inspection instructions, refer to para. 2-14.
1.
Inspect backing plate (7), five clutch plates (10), and dished plate (9) (1995-1996 transmission only)
for signs of burning, scoring, or cracks. Replace any plate if burned, scored, or cracked.
c. Inspection
b. Cleaning
a. Disassembly
INITIAL SETUP:
Applicable Models
M997A2, M1025A2, M1035A2,
M1043A2, M1045A2, M1097A2, M1123
Tools
General mechanic’s tool kit:
automotive (Appendix G, Item 1)
Special Tools
Clutch spring compressor
(Appendix G, Item 47)
Adapter (Appendix G, Item 48)
Adapter (Appendix G, Item 45)
Seal protectors (Appendix G, Item 46)
Manual References
TM 9-2320-280-24P


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